You might like Left Right Triangles within a Square Gordon House 1971 Triangles within a Square Gordon House 1971 Triangles within a Square Gordon House 1971 Triangles within a Square Gordon House 1971 Triangles within a Square Gordon House 1971 Triangles within a Square Gordon House 1971 Elongated Triangles 5 Bridget Riley 1971 First Triangles William Scott 1972 Second Triangles William Scott 1972 Triangles Richard Smith 1978 Triangles Richard Smith 1978 Triangles Richard Smith 1978